Malicious PDF — malware analysis report

Static analysis result for SHA-256 82fb62335fe2b5c3…

MALICIOUS

PDF

56.2 KB Created: 2020-08-04 16:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79a7c9731c1ce2978d6a53761b860452 SHA-1: b629e8d6e43f9fb5365b2471774f20057adce58b SHA-256: 82fb62335fe2b5c3720829eb24dfc84ddfd3fc5be03e235613f8b17c80f5f35d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains a URL that matches the one identified by the malicious redirector heuristic. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted from this sample.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=cours+dissection+aortique+pdf
    • http://files.maltafpd.com/uploads/1/3/0/7/130739081/6135384.pdf
    • http://files.markallisonart.com/uploads/1/3/0/9/130969498/donanixu.pdf
    • http://files.lavishexcursions.com/uploads/1/3/0/7/130739004/1553151.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/16910739947.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/28873511650.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/nuxativapil.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/jalobamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1469/files/dizinokerumozekagudorun.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/bulovevusidanev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/zagufigugunag.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/xiwezexirininotuwonel.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e95.bin
82cd4a279df0c57c0b5b294f1d781019017efaf2e30d3212171f016f5be80d65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E95 5148 bytes
font_01_sfnt_off00009025.bin
e9d5aa2bf49ddbdd332338ba77e6969e97f6e3c750b7ddf7e666461d5370d72b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9025 14904 bytes
font_02_sfnt_off0000be46.bin
ebd57d2a71d2a95b03cf44eeaee6144b2d4f881d5528b25618ee60816730c40d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE46 16196 bytes

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